Sand-molding apparatus.



H. TSCHERNING.

SAND MOLDING APPARATUS. APPLICATION man AUG.23. l9l6.

Patented Jan. 30,1917.

-' i so i as HENRY TSCHERNING, F FREEPORT, ILLINOIS.

SAND-MQLDING APPARATUS.

Application filed August 23, 1916.

To all whom it may concern:

Be it known that I, HENRY TSCHERNING, a citizen of the United States, and resident of F reeport, in the county of Stephenson and State of Illinois, have invented certain new and useful Improvements in Sandldolding Apparatus, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to sand molding -pparatus, and particularly to devices for removing patterns from the mold and leaving the flask and mold free.

The invention is illustrated as applied to a sand jarring machine for molding.

In the accompanying drawings, Figure 1 is a perspective view of the principal parts of a molding machine provided with my devices. Fig. 2 is an elevation of the devices seen in Fig. 1 looking from the right and the parts being changed in relative position. Fig. 3 is a view like Fig. 2, but with the parts further changed in position. Fig. 4 is a section on the line 4-4, Fig. 2.

In these views, 5 represents the body of a wheel-supported sand jarring machine having a jarring cylinder 6 carrying a jarring, mold-supporting table 7, without novelty herein claimed. From each end portion of the body 5 rises a rigid hollow post 8 in which slides vertically a rod 9. To the upper end of each rod 9 is fixed a rigid crosshead 10 having a hub 11 which, when the parts are in the position of Fig. 1, rests upon the upper end of the post 8. Through the body 5 runs a rock-shaft 12 operated by a lever handle 13 and provided at each end with a crank 14 connected by a link 15 to the corresponding hub 11 so that the crossheads at each end of the machine are equally raised and lowered by swinging the handle.

13. On the table 7 primarily rests a pattern plate 16, on this rests a stripping plate 17 and on the stripping plate a flask 18, usually of metal. On the posts 8 are supported rotary collars 19 having arms 20 connected by a link 23 so that the rotation of one causes a like rotation of the other. Near each end of the flask 18 are equal parallel rigid rods 21 connected with the flask which slide in ways in the stripping plate 17 and in the corresponding crosshead 10, and primarily extend downward alongside the collars 19, in contact with the arms 20 which are normally pressed against the rods by a spring 22 tending to rotate onecollar di- Specification of Letters Patent.

Patented Jan. 30, 1917.

Serial No. 116,426.

rectly and to rotate the other equally by means of the link 23.

W hen the parts are arranged as in Fig. 1 and sand placed on the pattern in the flask has been properly packed by jarring, the operator swings the lever 13 from the primary position, or that illustrated in Fig. 1, toward the position shown in Fig. 2, whereby the cranks 1i and links 15 lift the crossheads 10 which carry with them guide pins fixed in the stripper plate and projecting downward against the crossheads, and thus lift the stripper plate and the flask with its rods 21. As scenes the lower ends of the rods 21 rise about the collars 19, the spring 22 swings the collars through a limited angle and brings bosses 24 under the rods so that the rods and flask cannot descend however the cranks may be manipulated. The cranks being swung slightly past alinement with the links hold the stripper plate raised until the operator again swings the handle 13. The pattern plate and pattern are thus left below and free from the flask and stripper plate. If now the handle lever 13 be swung back to initial position, the stripper plate descends as shown in Fig. 3, leaving the flask supported solely by the pins, and ready to be removed. After removal, the collars may be swung from pin-supporting position by means of the handle 25, allowing the pins to descend; and the entire operation may be repeated indefinitely.

What I claim is:

1. In apparatus of the class described, the combination of a pattern plate, a stripper plate primarily superposed thereon, and a flask primarily resting upon the stripper plate, of means for raising and lowering the stripper plate, and means for independently supporting the flask when it has been raised with the stripper plate.

2. The combination with a sand jarring table, of a pattern plate resting thereon, a stripping plate normally superposed upon the pattern plate, a flask normally resting upon the stripping plate, means for raising the stripping plate and the flask together, and automatic means for preventing the descent of the flask when the stripping plate is again lowered.

3. In apparatus of the class described, the combination with a suitable table, of a pattern plate resting thereon, a stripper plate normally resting upon the pattern plate and itself supporting a flask, means for lifting the opposite ends of the stripper plate equally and returning it to initial position, means for automatically holding the flask against descending with the stripper plate, and devices for at will throwing the last named means out of action.

4. The combination with a sand jarring device and a stripper plate normally sup- I ported thereby, of cranks adapted to lift paratus, of a pattern plate supported thereby, a stripper plate and superposed flask normally supported upon the pattern plate, manually operable connecting cranks, means whereby the cranks when properly actuated lift equally opposite ends of the stripper plate andflask, vertically movable flask supporting rods, and spring actuated devices arranged to pass automatically, under the rods as soon as the latter are raised to a predetermined height, to support the flask independently of the stripper plate. 7

6; The combination with sand jarring apparatus, a pattern; plate supported thereby, a stripper plate, a; rock shaft parallel to the stripperpl-ate, and equal cranks fixed to the rock;- shaft, of means,,including an upwardly 7 extending pitman, whereby :each crank may he, the corresponding end of the stripper plate-when the shaft is rocked, said cranks and pitmen being arranged to pass alining positioIl as the stripper plate rises andthereby to) lock: the; stripper plate, automatically, in

raised position until the movement of the rock-shaft. is; reversed. 7 y

In testimony whereof I hereunto aflix my signature HENRY TSCHERNING.

copies of this patent may be obtained for flve cents; each, by, addressing; the, Commissioner of Patents.

- Washington, 110; V

It is hereby certified that Letters Patent Noe 1,213,979, granted January 30, 1917, upon the application of Henry Tscherning, of Freeport, Illinois, for an improvement in Sand-Molding Apparatus, were erroneously issued to the inventor, said Tscherning, whereas said Letters Patent should have been issued to Arcade Manufacturing Company, of Freeport, Illinois, a corporation of Illinois, as assignee of the entire interest in said invention as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 20th day of February, A. D., 1917.

F. W. H. CLAY,

Acting Commissioner of Patents.

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